Oil burner



Oct. 11,1927.

1,644,958 (2. w. SIEVERT OIL BURNER Filed Aug. 31, 1925 2 Sheets-Sheet].

Jnpkwior. Ffiw/es. W 5160872.

Oct. 11, I C. SIEVERT OIL BURNER Filed Aug. 51. 1925 2 Sheets-Sheet 2' Patented Oct. 11 1927.

UNITED 1,644,958 PATENT orricE.

CHARLES W. SIEVERT, LOS ANGELES, CALIFORNIA.

OIL BURNER.

Application filed August 31, 1925. Serial No. 53,481.

This invention relates to hydrocarbon burners of the general character shown in Patents Nos. 738,635, 710,899 and 958,330, issued to me on September 8, 1903, October 7, 1902, and May 17, 1910, respectively; and has for its general object to provide a burner of this class which is particularly ethcient, yet of simple and inexpensive construction.

As is true of the devices described in the above mentioned patents, the burner here disclosed has a curved air pipe adapted to conduct air from the side of the burner bowl and deliver downwardly upon the fuel within the bowl. While there are shown two induction branches and one discharge opening in the air pipe, it will be understood I may provide more induction branches without interfering materially with the upward play. of flame from the bowl and without departing from the spirit and scope of the broader claims appended hereto.

It is among the objects of the present invention to provide a burner of the general type described above which shall be of increased eflicienc-y by virtue of more nearly perfect admixture of the air with the hydrocarbons to promote the thorough combustion of the oil and its gaseous products. This result is obtained by providing a director 80 member extending around the inner face of the bowl and spaced downwardly from the upper edge thereof. This member directs the vapors somewhat inwardly. from the upper edge of the bowl, but as the vapors reach the upper edge of the member they break thereover and expand to fill the combustion space above the member. In breaking over the director edge and in being met by a course of air directed to meet it at said edge, the vapor is more thoroughly broken up and commingled with the air, to obvious advantage.

The director gives to the burner the advantages of a relatively large bowl as tar 4 as extent of flame spread is concerned;

while, by initially confining the flame to a relatively small area, it has the advantages of a relative small bowl as regards quickfiring characteristics. 7

I have also devised a fuel control system for the burner, whereby, in the event the flame is accidentally extinguished, the oil level within the burner is held below the upper edge of the bowl, thus eliminating the danger and unpleasantness of over-flowing oil. When it is discovered that the burner flame is extinguished, it is merely necessary to ignite the oil gathered in the bowl, no oil draining, valve manipulation or kindred operations being necessary to return the burner to operative condition.

Other objects and novel features of the invention will be set forth in the following detailed description, reference being had to the accompanying drawings, in which:

Fig. 1 is an elevation of ny improved burner, showing the fuel regulating system a detached, plan view of the i Fig. 8 is a section on line 88 of Fig. 7. 4.

In the drawings, numeral 10, designates a base plate, preferably an iron casting, serving to support the burner on a ring, bracket or other suitable structure (not shown) within a ,stove or furnace (not shown). v

The plate is centrally apertured at 11. Removable bowl 12 rests on plate 10 and has a boss 13 extending into aperture 11 to prevent lateral shifting of the bowl over the .plate, while bowl lugs .14: are'adapted to enter plate slots 15, which extend radially from aperture 11, whereby the bowl is held from being rotated out of proper position on the plate. Lugs 16 on the bowl bottom engage the top of the plate to hold the bowl in an upright position.

Bowl 12 has a central bore 17 adapted to take the threaded end of feed pipe 18., there being an annular depression or fuel well 19 in the inner bottom faceof the bowl about bore 17. The orifice of pipe 18 preferably opens at a point some distance above the well.

Spaced downwardly from the upper edge extends upwardly and outwardly from .the vertical axis of the bowl, terminal edge 23 being common to said face and to air directing face 24E which inclines upwardly and inwardly from the inner face of the bowl. While face 22 has been described as inclining outwardly and upwardly from the vertical axis of the bowl, it will be noted it is adapted to direct vapors somewhat inwardly with respect to bowl edge 20. It will be notedthat edge 23 is in a horizontal plane above the orifice of pipe 18.

While the. above characteristics of the director member are preferable, it will be understood the invention, in its broader aspects, is not limited thereto, for the cross sectional characteristics of the rib may be altered in certain respects without departing from the spirit and scope of the broader claims appended hereto.

Air delivery pipe 25 has two induction branches 26, the passageways 27, of which are in register with plate apertures 28. The ends of the branches rest on top plate 10 and the plate is held from shifting laterally by upstanding plate rings 29. Passageways 27 lead to discharge opening 30 which is adapted to deliver air downwardly upon the center of thebowl. r

I will first describe the operation of the device without regard to the particular feed system used. Incoming oil overflows pipe 18- into well 19, which may be termed a priming cup, and is ignited. The well is of such depth that there is assured a supply of oil completely about pipe 18 even though the burner be tipped considerably out of' level, thus insuringthat heat-is applied to the bowl entirely around the pipe; whereas alike amount of oil in the bottom of an unrecessed bowl would flow to one side of the pipe under similar circumstances and one side of the bowl would have no heat directly applied to it when the priming fluid is lighted. By proper regulation of oil feed,

the well need never be overflowed prior to the bowl being heated to vaporizing temperature, and there thusbeing a comparatively large bowl area exposed to the flame, rather than covered by oil, the'bowl temperature rises with surprising rapidity. By providing boss 13 and by giving increased thickness to the bowl at 31 adjacent the boss,

the bowl isbetter able to retain the heat imparted to it by the burning oil.

The draft created by the burning hydrocarbon causes a movement of the air as incheated by the arrowsin F igs. 2 and 6, the

air mixing with thevaporized oil in sufflcient quantities to insure eflicient burning. As the vapor is directed upwardly and outwardly by face 22 it breaksover edge 23 and expands, becoming'more thoroughly broken up and commingling with the air in the bowl. Furthermore, the air thus admitted over the bowl edge is directed upwardly by face 24: and, in meeting the vapors directed to edge 23, thereis caused a tumbling and agitation of the vapors above said edge, thus even more thoroughly mixing the air and hydrocarbon vapors. It is found that combustion actually occurs around edge 20, the air coming in over said edge aiding the director face 22 in confining the flame spread to an area approximately overlying the bowl but insuring a good clean flame entirely over this limited area.

The fuel oil is'adapted to be fed by pressure; and it will be evident that,in the absence of preventative means, should the flame be accidentally extinguished, oil would soon gather in the bowl and overflow. Therefore, I have introduced an oil level control valve in the feed system.

' Pipe 18 is led from the bottom of chamber 32 invalve casing 33. Inlet pipe 3% also leads to this chamber, but a valve 35, controlled by float 36, is adapted to shut off the inflow of oil to, the chamber under certain circumstances. Regulating valve 37 is interposed between pressure feed line 38 and inlet pipe 34. The float valve is so arranged and so relatively disposed with respect to bowl 12 that when the oil level in said bowl reaches a predetermined height, preferably below edge 23, float 36 and valve 35 act to shut off the flow of oil to chamber'32 and that during normal operation of the device,

with the flame extinguished and 'oil con-" sequently gathering in the bowl, as soon as the common predetermined level in bowl and float chamber is reached, the pressure feed of-oil is cut off.

It will be evident that the burner may be subsequently re-fired by igniting the bowl contained oil and that the float valvewill act automatically to re-admit oil under pressure when the proper time arrives. The advantages of this automatic oil level control are self-evident and warrant no discussion here.

In Figs. 7 and 8 by invention is shown applied to a burner of slightly modified construction. Bowl 12 has an integral, annular support flange 1O and leading up through the bowl are air passages 28% the walls 28 of which are formedintegral with the bowl. Air pipe 25 isadapted to rest with its two induction branches 26 upon the upper ends of walls 28 and shoulders Its outlet opening 30 directs the air downwardly over the center of the bowl which is'formed and equipped in a manner similar to that described in connection with bowl 12. Director 22 is provided about the inner face of. the bowl and function in a manner similar to director 22. The director or rib is necessarily interrupted by walls 28 It is believed a full understanding of the invention will be had from the foregoing, but it will be understood the drawings and description are to be considered merely illustrative of and not restrictive on the broader claims appended hereto.

I claim:

1. An oil burner embodying a bowl, oil supply means leading to the bowl, an air pipe adapted to discharge downwardly centrally into the bowl, and an annular rib formation on the inner face of the bowl and spaced below the upper edge thereof, adapted to direct air, discharged from said pipe, in an upward direction in a stream spaced inward from said upper edge of the bowl.

2. An oil burner embodying a bowl, oil supply means leading to the bowl, an air pipe adapted to discharge centrally clownwardly into the bowl, an annular rib formation on the inner face of the bowl and spaced below the upper edge thereof, adapted to direct air discharged from said pipe in an upward direction in a stream spaced inward from said upper edge of the bowl, and means extending inwardly from the face of the bowl and adapted to direct air entering said bowl over said top edge into the air stream directed by said first mentioned directing means.

3. An oil burner embodying a bowl having a depression in its inner bottom face forming an oil well, oil supply means leading to the well, an air pipe leading from beneath the bowl and discharging downwardly at a point over the well, and means on the inner face of the bowl between the oil well and the upper edge of the bowl adapted to direct air discharged from said pipe, in an upward direction and in a stream spaced inward from said upper edge of the bowl.

l. An oil burner embodying a bowl, an oil supply pipe leading upwardly through the bottom of the bowl and with its delivery orifice spaced above the inner bottom face of the bowl, an air pipe adapted to discharge downwardly into the bowl, and an annular air deflecting rib extending inwardly from the side wall of the bowl, the upper edge of said rib being in a horizontal plane between the upper edge of the bowl and said delivery orifice.

5. An oil burner embodying a bowl, oil

supply means leading to the bowl, an air pipe adapted to discharge downwardly into the bowl; and an annular air deflecting rib extending inwardly from the side wall of the bowl and vertically spaced from the upper edge of the bowl.

In witness that I claim the foregoing I have hereunto subscribed my name this 13th day of March, 1925.

CHARLES W. SIEVERT. 

